is it safe to delete tok-cirrhatus?

i have scanned my brother's computer using AVG before and detected brontok virus. however when i installed ewido 4, and opened analysis of the startup iems, i noticed tok-cirrhatus which is probably a remnant of the virus. can i safely delete this? how can i remove a pop-up searching for explorasi.exe using ewido?

what is a prefetch? these things are suspicious files right? how can i completely remove remnants of a brontok.ae virus which appears to infect my computer before? should i leave the remnants alone for they are already harmless?

Before running CCleaner you should configure it by clicking Options/Advanced and unchecking the box for 'Only delete files in Windows Temp folders older than 48 hrs'. (CCleaner will get rid of your old Prefech data by the way).